Fix accessibility issues

[jordanjones243]

Describe the bug

When running the accessibility testing in this component, there were multiple accessibility errors that were discovered and need to be addressed

To Reproduce

Steps to reproduce the behavior:

1. Open this repo locally
2. Run the tests
3. See error

Expected behavior

No accessibility errors appear when running the test

Screenshots

[jason-capsule42]

@sun-mota can you check this against your other a11y testing and see if this is still an issue?

[sun-mota]

@sun-mota can you check this against your other a11y testing and see if this is still an issue?

This is still an issue when there is no title slot.
We need to either throw an error or remove h2 when there is no title slot

[blackfalcon]

FWIW, I wouldn't consider this a critical a11y issue. Low at best. While it is considered best practice to never leave any HML node empty, if there is no content, most screen readers will simply pass over the HTML element.